package com.qf.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 处理器： Controller
 *    springmvc.xml   @Bean  <bean id class
 *      <mvc:interceptors>
 *          <mvc:interceptor>
 *              <interceptor mapping="/>
                <bean class="MyInterceptor
 *          </mvc:interceptor>
 *      </mvc:interceptors>
 * @author lixu
 */
public class MyInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("方法前");
        //SpringBoot一个项目  判断用户是否登录

        return true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("方法后");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("页面渲染后");
    }
}
